关于后端:SpringBoot网络在线学习系统的设计与实现

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[项目名称

SpringBoot 网络在线学习零碎的设计与实现

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SpringBoot 网络在线学习零碎的设计与实现 ](https://ym.maptoface.com/archives/57022)

视频演示

SpringBoot 网络在线学习零碎的设计与实现_哔哩哔哩_bilibili

零碎介绍

3.1.3 零碎用例模型

零碎包含了三种用户角色，用户的用例图也须要有三个用户角色。

管理员的功能模块次要包含人员治理、课程管理、章节治理、签到治理、测评治理、答疑治理、作业管理等性能，管理员用例图 3 - 1 如下所示。

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图 3 -1 管理员用例图

学生的功能模块次要是为学生用户设计的，包含了教学信息的查看、在线自测、学生登录、下载作业、学生签到、批改个人资料、批改明码等性能。学生用户是零碎的前台次要应用人员，他们的操作数据将为零碎的根底数据提供保障，学生用例图如下 3 - 2 所示。

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图 3 -2 学生用例图

老师的功能模块次要是针对课程信息的保护和学生作业、测评的评判与打分。包含课程管理、章节治理、签到治理、测评治理、答疑治理、作业管理等性能。老师作为课程的主讲人和学生的辅导者，须要对学生的学习状况和作业实现状况进行跟踪和评估，并对学生提出问题进行答疑解惑，为学生提供更好的学习体验和教学效果，老师用例图如下 3 - 3 所示。

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图 3 -3 管理员用例图

环境须要

1. 运行环境：最好是 java jdk 1.8，咱们在这个平台上运行的。其余版本实践上也能够。
2.IDE 环境：IDEA，Eclipse,Myeclipse 都能够。举荐 IDEA;
3.tomcat 环境：Tomcat 7.x,8.x,9.x 版本均可
4. 硬件环境：windows 7/8/10 1G 内存以上；或者 Mac OS；
5. 数据库：MySql 5.7 版本；
6. 是否 Maven 我的项目：否；

技术栈

  1. 后端：Spring+SpringMVC+Mybatis
  2. 前端：JSP+CSS+JavaScript+jQuery

应用阐明

  1. 应用 Navicat 或者其它工具，在 mysql 中创立对应名称的数据库，并导入我的项目的 sql 文件；
  2. 应用 IDEA/Eclipse/MyEclipse 导入我的项目，Eclipse/MyEclipse 导入时，若为 maven 我的项目请抉择 maven;
    若为 maven 我的项目，导入胜利后请执行 maven clean;maven install 命令，而后运行；
  3. 将我的项目中 springmvc-servlet.xml 配置文件中的数据库配置改为本人的配置;
  4. 运行我的项目，在浏览器中输出 http://localhost:8080/ 登录

运行截图

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 用户管理控制层:

package com.houserss.controller;

import javax.servlet.http.HttpSession;

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.houserss.common.Const;
import com.houserss.common.Const.Role;
import com.houserss.common.ServerResponse;
import com.houserss.pojo.User;
import com.houserss.service.IUserService;
import com.houserss.service.impl.UserServiceImpl;
import com.houserss.util.MD5Util;
import com.houserss.util.TimeUtils;
import com.houserss.vo.DeleteHouseVo;
import com.houserss.vo.PageInfoVo;

/**

  • Created by admin
    */

@Controller
@RequestMapping(“/user/”)
public class UserController {

@Autowired
private IUserService iUserService;

/**
 * 用户登录
 * @param username
 * @param password
 * @param session
 * @return
 */
@RequestMapping(value = "login.do",method = RequestMethod.POST)
@ResponseBody
public ServerResponse<User> login(User user,String uvcode, HttpSession session){String code = (String)session.getAttribute("validationCode");
    if(StringUtils.isNotBlank(code)) {if(!code.equalsIgnoreCase(uvcode)) {return ServerResponse.createByErrorMessage("验证码不正确");
        }
    }
    ServerResponse<User> response = iUserService.login(user.getUsername(),user.getPassword());
    if(response.isSuccess()){session.setAttribute(Const.CURRENT_USER,response.getData());
    }
    return response;
}

}

管理员管理控制层:

package com.sxl.controller.admin;

import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.sxl.controller.MyController;

@Controller(“adminController”)
@RequestMapping(value = “/admin”)
public class AdminController extends MyController {



@RequestMapping(value = "/index")
public String frame(Model model, HttpServletRequest request)throws Exception {return "/admin/index";}

@RequestMapping(value = "/main")
public String main(Model model, HttpServletRequest request)throws Exception {return "/admin/main";}

@RequestMapping(value = "/tj1")
public String tj1(Model model, HttpServletRequest request)throws Exception {String sql="select DATE_FORMAT(insertDate,'%Y-%m-%d') dates,sum(allPrice) price from t_order order by DATE_FORMAT(insertDate,'%Y-%m-%d')  desc";
    List<Map> list = db.queryForList(sql);
    model.addAttribute("list", list);
    System.out.println(list);
    return "/admin/tj/tj1";
}


@RequestMapping(value = "/password")
public String password(Model model, HttpServletRequest request)throws Exception {return "/admin/password";}


@RequestMapping(value = "/changePassword")
public ResponseEntity<String> loginSave(Model model,HttpServletRequest request,String oldPassword,String newPassword) throws Exception {Map admin = getAdmin(request);
    if(oldPassword.equals(admin.get("password").toString())){
        String sql="update t_admin set password=? where id=?";
        db.update(sql, new Object[]{newPassword,admin.get("id")});
        return renderData(true,"1",null);
    }else{return renderData(false,"1",null);
    }
}

}

批改明码业务逻辑:

package com.sxl.controller.admin;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.sxl.controller.MyController;

@Controller(“userController”)
@RequestMapping(value = “/user”)
public class UserController extends MyController {



@RequestMapping(value = "/index")
public String frame(Model model, HttpServletRequest request)throws Exception {return "/user/index";}

@RequestMapping(value = "/main")
public String main(Model model, HttpServletRequest request)throws Exception {return "/user/main";}


@RequestMapping(value = "/password")
public String password(Model model, HttpServletRequest request)throws Exception {return "/user/password";}


@RequestMapping(value = "/changePassword")
public ResponseEntity<String> loginSave(Model model,HttpServletRequest request,String oldPassword,String newPassword) throws Exception {Map user = getUser(request);
    if(oldPassword.equals(user.get("password").toString())){
        String sql="update t_user set password=? where id=?";
        db.update(sql, new Object[]{newPassword,user.get("id")});
        return renderData(true,"1",null);
    }else{return renderData(false,"1",null);
    }
}
@RequestMapping(value = "/mine")
public String mine(Model model, HttpServletRequest request)throws Exception {

Map user =getUser(request);Map map = db.queryForMap(“select * from t_user where id=?”,new Object[]{user.get(“id”)});model.addAttribute(“map”, map); return “/user/mine”;

}



@RequestMapping(value = "/mineSave")
public ResponseEntity<String> mineSave(Model model,HttpServletRequest request,Long id
    ,String username,String password,String name,String gh,String mobile) throws Exception{
    int result = 0;
        String sql="update t_user set name=?,gh=?,mobile=? where id=?";
        result = db.update(sql, new Object[]{name,gh,mobile,id});
    if(result==1){return renderData(true,"操作胜利",null);
    }else{return renderData(false,"操作失败",null);
    }
}
}

通用治理模块:

package com.sxl.controller;

import java.nio.charset.Charset;
import java.util.Locale;
import java.util.ResourceBundle;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;

import com.sxl.util.JacksonJsonUtil;
import com.sxl.util.StringUtil;
import com.sxl.util.SystemProperties;

public class BaseController {

public static final Long EXPIRES_IN = 1000 * 3600 * 24 * 1L;// 1 天

@Autowired
private SystemProperties systemProperties;

/**
 * 取得配置文件内容
 */
public String getConfig(String key) {return systemProperties.getProperties(key);
}

/**
 * 返回服务器地址 like http://192.168.1.1:8441/UUBean/
 */
public String getHostUrl(HttpServletRequest request) {String hostName = request.getServerName();
    Integer hostPort = request.getServerPort();
    String path = request.getContextPath();

    if (hostPort == 80) {return "http://" + hostName + path + "/";} else {return "http://" + hostName + ":" + hostPort + path + "/";}
}

/***
 * 获取以后的 website 门路 String
 */
public static String getWebSite(HttpServletRequest request) {String returnUrl = request.getScheme() + "://"
            + request.getServerName();

    if (request.getServerPort() != 80) {returnUrl += ":" + request.getServerPort();
    }

    returnUrl += request.getContextPath();

    return returnUrl;
}



/**
 * 初始化 HTTP 头.
 * 
 * @return HttpHeaders
 */
public HttpHeaders initHttpHeaders() {HttpHeaders headers = new HttpHeaders();
    MediaType mediaType = new MediaType("text", "html",
            Charset.forName("utf-8"));
    headers.setContentType(mediaType);
    return headers;
}

/**
 * 返回 信息数据
 * 
 * @param status
 * @param msg
 * @return
 */
public ResponseEntity<String> renderMsg(Boolean status, String msg) {if (StringUtils.isEmpty(msg)) {msg = "";}
    String str = "{\"status\":\"" + status + "\",\"msg\":\""+ msg +"\"}";
    ResponseEntity<String> responseEntity = new ResponseEntity<String>(str,
            initHttpHeaders(), HttpStatus.OK);
    return responseEntity;
}

/**
 * 返回 obj 数据
 * 
 * @param status
 * @param msg
 * @param obj
 * @return
 */
public ResponseEntity<String> renderData(Boolean status, String msg,
        Object obj) {if (StringUtils.isEmpty(msg)) {msg = "";}
    StringBuffer sb = new StringBuffer();
    sb.append("{");
    sb.append("\"status\":\"" + status + "\",\"msg\":\""+ msg +"\",");
    sb.append("\"data\":" + JacksonJsonUtil.toJson(obj) + "");
    sb.append("}");

    ResponseEntity<String> responseEntity = new ResponseEntity<String>(sb.toString(), initHttpHeaders(), HttpStatus.OK);
    return responseEntity;
}


/***
 * 获取 IP（如果是多级代理，则失去的是一串 IP 值）*/
public static String getIpAddr(HttpServletRequest request) {String ip = request.getHeader("x-forwarded-for");
    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("Proxy-Client-IP");
    }

    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("WL-Proxy-Client-IP");
    }

    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {ip = request.getRemoteAddr();
    }

    if (ip != null && ip.length() > 0) {String[] ips = ip.split(",");
        for (int i = 0; i < ips.length; i++) {if (!"unknown".equalsIgnoreCase(ips[i])) {ip = ips[i];
                break;
            }
        }
    }

    return ip;
}

/**
 * 国际化取得语言内容
 * 
 * @param key
 *            语言 key
 * @param args
 * @param argsSplit
 * @param defaultMessage
 * @param locale
 * @return
 */
public static String getLanguage(String key, String args, String argsSplit,
        String defaultMessage, String locale) {
    String language = "zh";
    String contry = "cn";
    String returnValue = defaultMessage;

    if (!StringUtil.isEmpty(locale)) {
        try {String[] localeArray = locale.split("_");
            language = localeArray[0];
            contry = localeArray[1];
        } catch (Exception e) {}}

    try {
        ResourceBundle resource = ResourceBundle.getBundle("lang.resource",
                new Locale(language, contry));
        returnValue = resource.getString(key);
        if (!StringUtil.isEmpty(args)) {String[] argsArray = args.split(argsSplit);
            for (int i = 0; i < argsArray.length; i++) {returnValue = returnValue.replace("{" + i + "}",
                        argsArray[i]);
            }
        }
    } catch (Exception e) { }

    return returnValue;
}

}

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后端
发表至： 后端
2023-06-26
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